Improved millstone-curb



To all whom it may concern.-

T fianitltl gnaw ALEXANDER.VANTVLEOK AND THOMAS PHILLIPS, OF J ORDAhL- NEW 7 'YORK.

I Letters ram Nb. 105,610, dated my .19, 1870.

mpnovs'n ivrrnns'roa a'cwas.

The Schedule referred to in these Letters Patant and making part of the same.

Be it known that we, ALEXANDER VAN V'LnoK and THOMAS PHILLIPS, of Jordan, in the county of Onondaga and State of New York, have invented a new and useful Improvement in Millstone-Curbs"; and we do hereby declarethatthe following is a full, clear, and exact description 'thereofi which will enable those skilled in the art to make. and use the same, reference being bad to the accompanying drawing forming part of this specification, in which- H Figure l'is a perspective view of our invention, and Figure 2 is a horizontal section of thesame. Figures 3 and ishow a modification of the valve. I Similar letters of reference indicate like parts in the several figures.

In millstone-curbs, as ordinarilyconstructed, the

sweat or moisture, caused bythe friction or heat of y the stone, settles on the inside wall of the curb, and

flour-dust becomesfixed in said moisture to such an; extentthat a thick formation of dough is soon made on said inner surface vof the curb, and becomes sour and foul, and the curb has to be cleaned as often as the stone is lifted.

This invention relates to an improved method for.

obviating this'objection; and g The invention consists in making two or more openings in the wall of the curb; so that the 'air can pass freely through them, and providing, in connection with one of these. openings, an adjustable butment valve or door, for creating a circulation of air through the said openings, as hereinafter more fully explained.

. In the accompanying drawing- A is the curb, H is the stone, and

F is the discharge for the-flour.

The curb A ismadewith three openings, 0 DE,

fig. 2, and't-he opening 0 is provided with an adjustable door or valve, B, to regulateand cause the circulation of air through the holes or openings inthe sides a of curb A. This door is hung on a shaft or pivot, at

one edge. Theisaid shaft stands vertically, and its upper end projects upward through the top of the curb or casing, and a set-screw, g, fig. 1, passing through a slotted segment, G that is fastened to the upper end of the said shaft, serves to set or fasten the valve B in any position desired.

Its operation is as follows The revolving stone H causes a rotative movement of air within the curb, in the direction shown by the arrows, fig. 2. The valve B is set partly open, as shown, and the revolving stone draws in a current of air at the opening or port 0, and this air passes around inside of the curb until its further passage is obstructed by the valve B, and this causes it to flow out through the opening D, and, by this means, a constant circulation of air through and around, inside of the curb A,

' is obtained, and this prevents the moisture from set-- tling on the curb, and thereby obviates the formation of paste or dough on the walls of the curb, as heretofore.

Thefiour-discharge F is placed immediately in the rear of the valve B, so that the obstruction of the air by the said valve, at this point, shall favor the flow or passage of flour-dust into the discharge F.

But two openings, 0- and 1), are necessary for producing the circulation of air, but one or more additional openings, l],- can be made.

The valve B can be set at various angles, so as to give a greater or lesser degree of circulation, as desired; and, in cold weather, during the winter, when it is desirable to retain all of the heat within the curb, it can be closed entirely. b

The valve B can be made in the form of a sliding door, and operated by set-screws b l), figs.. 3 and 4, and

can be arranged in various ways soas to form the ob-.

structiou or abutment as the door is opened.

By these means, the waste and labor of cleaning the curb, arlsing from said fouling, is obviated, and the action of the devices for circulating the air can be reg ulated, or shut off altogether, as desired.

We do not claim, broadly, a millstone-curb, provided with ventilating apertures; .but

What we do claim is- The combination, in the millstone-curb A, of two or more openings 0 D E, with the adjustable valve B, when constructed and arranged in the manner and for the purpose herein set forth. I

The above specification of our invention signed by us this 5th day of April, 1870.

ALEX. VAN VLEGK. THOMAS PHILLIPS.

Witnesses:

- WM. DEMEAN,

F. A Moannv. 

